26291993 has 24 divisors (see below), whose sum is σ = 33313728. Its totient is φ = 20203488.

The previous prime is 26291987. The next prime is 26292001. The reversal of 26291993 is 39919262.

It is not a de Polignac number, because 26291993 - 2¹⁰ = 26290969 is a prime.

Its product of digits (52488) is a multiple of the sum of its prime divisors (162).

It is a self number, because there is not a number n which added to its sum of digits gives 26291993.

It is not an unprimeable number, because it can be changed into a prime (26291983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 316730 + ... + 316812.

It is an arithmetic number, because the mean of its divisors is an integer number (1388072).

Almost surely, 2^26291993 is an apocalyptic number.

It is an amenable number.

26291993 is a deficient number, since it is larger than the sum of its proper divisors (7021735).

26291993 is an equidigital number, since it uses as much as digits as its factorization.

26291993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 162 counting only the distinct ones).

The product of its digits is 52488, while the sum is 41.

The square root of 26291993 is about 5127.5718425001. The cubic root of 26291993 is about 297.3544913736.

The spelling of 26291993 in words is "twenty-six million, two hundred ninety-one thousand, nine hundred ninety-three".